[amsat-bb] Linear Transponder Up and Down link frequency calculator

[Vinny Stipo]

Am I missing something? Why not just put this info in a online
worksheet/excel, rather than compile a program with no source code?

-Vinny KM2W

On Tue, Apr 30, 2019 at 7:01 AM Hasan al-Basri via AMSAT-BB <
amsat-bb at amsat.org> wrote:

> Absolutelyl, no worries about doppler. The only one of concern was the 1200
> Hz error and I think that was a typo. I'll look for the update. Tnx so
> much, it is a wonderful asset to sat ops. 73, N0AN
> Hasan
>
>
> On Mon, Apr 29, 2019 at 11:56 PM Wendy and Terry Osborne <
> wandtosborne at gmail.com> wrote:
>
> > Hi Hassan,
> >
> > Just added CAS-4A to the list.
> > I was working off the AMSAT-NA Laminated frequency chart (April 2018).
> > Should have spotted it.
> >
> > I have also tweaked the frequency on CAS-4B to track with your
> > measurements.
> > Use the same link for the updated program.
> >
> > I’m tempted to add a few hundred Hertz to the conversion numbers to get
> > them spot on but the error
> > is probably less than the doppler correction required.
> >
> > Trying to correct for doppler would require a built in tracking program
> > and then you might as well use SatPC32.
> >
> > 73,
> > Terry ZL2BAC
> >
> > *From:* Hasan al-Basri <hbasri.schiers6 at gmail.com>
> > *Sent:* Sunday, April 28, 2019 11:48 PM
> > *To:* Wendy and Terry Osborne <wandtosborne at gmail.com>
> > *Cc:* AMSAT-BB <amsat-bb at amsat.org>
> > *Subject:* Re: [amsat-bb] Linear Transponder Up and Down link frequency
> > calculator
> >
> > Very nice Terry, but you forgot CAS-4a  :-)
> >
> > I work with pre-defined sat pairs to avoid Wifi spikes. Here are the
> > results for some of the common birds using our downlink and your uplink
> > (predicted) vs. what our uplinks really are for perfect audio.
> >
> > CAS-4B 145.918  435.287  Actual: 435.285.900
> > XW-2A  145.672   435.043  : 435.042.600
> > XW-2B  145.733   435.107  : 435.106.800
> > XW-2C  145.798   435.167  : 435.166.800
> >
> > Very solid agreement, tnx so much. It would have saved  us a lot of time
> > setting up the first time, had we had you nice program.
> >
> > Please add CAS-4A when you get time.
> >
> > 73, N0AN
> >
> >
> > Hasan
> >
> >
> > On Sat, Apr 27, 2019 at 8:41 PM Wendy and Terry Osborne via AMSAT-BB <
> > amsat-bb at amsat.org> wrote:
> >
> >> Hi Folks,
> >>
> >> With the number of Linear Transponder Satellites that are operational or
> >> in the pipeline,
> >> I thought a simple program to convert uplink to downlink frequencies was
> >> worth writing.
> >> I’ve written one for Windows.
> >> You can find it here:
> >>
> https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0
> >> I’ve put the exe file and the same file in zip format.
> >> I have put all the current birds plus the ones that have launches
> pending.
> >> Just select the satellite of interest from the “Satellite” drop down
> >> menu,
> >> put your frequency into the text box and hit the Up or Dn calculate
> >> button.
> >>
> >> Let me know if you think this is useful.
> >>
> >> 73,
> >> Terry Osborne ZL2BAC
> >> _______________________________________________
> >> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> >> to all interested persons worldwide without requiring membership.
> >> Opinions expressed
> >> are solely those of the author, and do not reflect the official views of
> >> AMSAT-NA.
> >> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> >> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
> >>
> >
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>